constantly keeps his superiors in Chennai updated on the investigation. At the hotel, he meets his neighbour Aradhana, an NRI. He immediately notices that she is going through a rough patch in her life and one night, worried about her safety, breaks into her room, only to find her attempting suicide, by asphyxiation. He saves her life and the two strike a friendship. Aradhana reveals that her violent husband, Arun, is filing for divorce, after cheating on her. Later, Raghavan and Anderson find a connection between Rani's murder in Madurai and a two-year-old unsolved disappearance of an Indian American girl, Chandana, whose finger was also possibly found hanging in her boyfriend Hitesh's car. Raghavan's instinct leads them to Chandana's body in a restricted area in the suburbs, found along with three other American women, murdered in a similar manner. After narrowing down their suspects using flight records, their suspicion falls onto two Indian doctors who studied in Brooklyn Medical University: Amudhan Sukumaran and Ilamaaran Aanandhan, who are secretly involved in the killings. They murder their former professor, Veronica, along with two NYPD officers in the same area, where Raghavan set them on surveillance, and leave the bodies there. Raghavan and Anderson visit Amudhan and Ilamaaran's apartment to question them, only to find it unoccupied. Raghavan and Anderson break into the apartment and find pictures of the victims and the murder weapons, thus cracking their case. Before they can call for backup, Ilamaaran arrives, unannouncedand, and shoots Anderson in the head, with a gun. Enraged, Raghavan hits him till he becomes unconscious. Right afterwards, Raghavan gets stabbed by Amudhan, with a scalpel. To buy time, Raghavan asks Amudhan why such intelligent young men, like them, would succumb to such psychopathic and heinous acts. Amudhan explains that they had developed a habit of killing from their childhood itself, starting with pushing a classmate from a train, at the age of 13, to murdering their school teacher, at the age of 17. He says that he and Amudhan stopped this activity once they joined MBBS, at Rani's college. Amudhan claims that he managed to keep his violent urges under control for three years, but when he saw Rani, he tried to assault and kill her, after she provoked him. Illamaran calmed him down and two days later, Arokiyaraj assaulted the duo, outside a theatre. He and Ilamaaran were locked up in the local